Modify verbiage in warning output

Co-authored-by: Kenneth Daily <kdaily@amazon.com>

Author: aemous

awscli/customizations/s3/subcommands.py

@@ -1154,8 +1154,8 @@ def run(self):
                     'Cyclic Redundancy Check 64 (CRC64NVME) will be used to '
                     'compute object checksums by default and included in '
                     'the request. This is different from v1 behavior, where '
-                    'Cyclic Redundancy Check 32 (CRC32) checksums will '
-                    'instead be used. For guidance on retaining v1 behavior '
+                    'Cyclic Redundancy Check 32 (CRC32) checksums '
+                    'are used. For guidance on retaining v1 behavior '
                     'in AWS CLI v2, or for more details, see '
                     'https://docs.aws.amazon.com/cli/latest/userguide/'
                     'cliv2-migration-changes.html'